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3 April, 12:16

An open box is formed by cutting a 5 inch square measured from each corner and folding up the sides. If the volume of the carton is then 40 in3, what was the length of a side of the original square of cardboard?

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  1. 3 April, 15:35
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    Hello,

    The height of the box is 5 in,

    so the area of the bottom is a square of 40/5=8 (in²) and the side is

    √8=2√2.

    The length of a side of the original square of cardboard is 10+2√2≈12,828427 ... (in)
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